| Our M620 was running incredibly hot at the Cadwell TD - got up to 126 degC (258f) at one point, and I'm told at this temperature the oil is getting a bit thin to be effective, but it's not running for too long so maybe it'll be ok with regular changes like TP says.
We fitted a DP oil cooler kit and it never got above 108C in the races.
They're expensive tho, and I couldn't find a kit ouside the DP catalogue. Baines offered to make me up a couple of hoses and radiatior, but then I'd've had to get the fittings and deflector elsewhere which would have pushed the price close to that of the DP kit. |